Question

se a=3x+5y-2 e b=-2x+3y+3, calcule

a) A-B



b) B-A

Answer 1

A=3x+5y-(2x+3y+3) B=2x+3y+3-(3x+5y-2)

3x+5y-2x-3y-3 2x+3y+3-3x-5y-2

3x-2x+5y-3y-3 2x-3x+3y-5y+3-2

x+2y-3 -x-2y +1

Answer 2

$a)a - b \\ 3x -5y - 2 - ( - 2x + 3y + 3) \\ 3x - 5y - 2 + 2x - 3y - 3 \\ 3x - 2x - 5y - 3y - 2 - 3 \\ x - 8y - 5$
$b)b - a \\ - 2x + 3y + 3 - 3x + 5y - 2 \\ - 2x - 3x + 3y + 5y + 3 - 2 \\ - 5x + 8y + 1$